Practice Product Sales Analysis III
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Product Sales Analysis III
Tables: Sales(sale_id INT, product_id INT, year INT, quantity INT, price INT). Sales has key (sale_id, year). A product can have multiple sales in a year; price is per unit. For each product, find its earliest sale year and return every sale from that year as product_id, first_year, quantity and price. Do not aggregate or select just one of several first-year sales. Output order is unrestricted.
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Understanding the Product Sales Analysis III Problem
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Problem Statement
Tables: Sales(sale_id INT, product_id INT, year INT, quantity INT, price INT). Sales has key (sale_id, year). A product can have multiple sales in a year; price is per unit. For each product, find its earliest sale year and return every sale from that year as product_id, first_year, quantity and price. Do not aggregate or select just one of several first-year sales. Output order is unrestricted.
Source: Product Sales Analysis III on LeetCode. Use the original task for its coding environment and submissions.
Product Sales Analysis III
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Examples
# Example 1
Sales table: +---------+------------+------+----------+-------+ | sale_id | product_id | year | quantity | price | +---------+------------+------+----------+-------+ | 1 | 100 | 2008 | 10 | 5000 | | 2 | 100 | 2009 | 12 | 5000 | | 7 | 200 | 2011 | 15 | 9000 | +---------+------------+------+----------+-------+
+------------+------------+----------+-------+ | product_id | first_year | quantity | price | +------------+------------+----------+-------+ | 100 | 2008 | 10 | 5000 | | 200 | 2011 | 15 | 9000 | +------------+------------+----------+-------+
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